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T3440.hs:11:22:
Could not deduce (a1 ~ a)
from the context (Fam a ~ Fam a1)
bound by a pattern with constructor
GADT :: forall a. a -> Fam a -> GADT (Fam a),
in an equation for `unwrap'
at T3440.hs:11:9-16
`a1' is a rigid type variable bound by
a pattern with constructor
GADT :: forall a. a -> Fam a -> GADT (Fam a),
in an equation for `unwrap'
at T3440.hs:11:9
`a' is a rigid type variable bound by
the type signature for unwrap :: GADT (Fam a) -> (a, Fam a)
at T3440.hs:11:1
In the expression: x
In the expression: (x, y)
In an equation for `unwrap': unwrap (GADT x y) = (x, y)
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